fix(skills): restore _send_feedback alias for pre-#542 workspace skills

[theo-michel]

Problem

#542 renamed Skill._send_feedback(message, image_b64) to feedback(message, image_b64). Workspace skills are user code living outside the repo, so any skill written before #542 still calls the old name and now crashes with AttributeError the first time it sends feedback.

Fix

A thin deprecated alias on the Skill base class: _send_feedback() delegates to feedback(). Signatures are identical, so old skills work unchanged; new skills keep using self.feedback().

Verification

• ruff check and ruff format --check clean on brain_client/
• 222/222 brain_client tests pass
• basedpyright reports no errors in the touched file (13 pre-existing errors elsewhere from basedpyright 1.39.9 being newer than the last-pinned run — none related to this change)

[greptile-apps]

Greptile Summary

Restores backward compatibility for user-authored workspace skills created before #542.

• Adds a deprecated Skill._send_feedback() alias.
• Delegates feedback messages and optional images directly to Skill.feedback().

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The restored method accepts the same arguments as the legacy API and delegates directly to the existing behavior-equivalent feedback implementation.

Important Files Changed

Filename	Overview
ros2_ws/src/brain/brain_client/brain_client/skills/types.py	Adds a signature-compatible deprecated alias that preserves the previous feedback behavior without changing the current API.

_{Reviews (1): Last reviewed commit: "fix(skills): restore _send_feedback alia..." | Re-trigger Greptile}

[DavidDobas]

LGTM